This is a 12-month, prospective, observational cohort trial involving Primary Care Trusts (PCTs) wishing to take part in the study and the Early Arthritis Clinic (Anti-CCP sub-clinic) at Chapel Allerton Hospital. The approximate duration of subject participation will be 12 months and the approximate total duration of the study will be 10 years. Patients who have not developed inflammatory arthritis within the 12 month period will have the opportunity to continue follow up within the clinic on an annual basis with additional visits as clinically indicated until the development of IA.

Patients presenting with non-specific musculoskeletal complaints at risk of development of RA.

Detailed Description:

There is accumulating evidence for the need to identify patients with rheumatoid arthritis (RA) early. Damage occurs early and early treatment is effective. Clearly there is a need to improve ways of identifying these patients.

It is recognised that patients with RA often have non-specific musculoskeletal complaints in the months or years prior to development of RA (unpublished observations). Family members of patients with RA are also at greater risk of developing RA.

Given we know that earlier identification of patients enables earlier treatment and this leads to better long-term outcomes, we need a method of identifying patients at the pre-clinical stage of disease.

C-reactive protein (CRP) is an acute phase reactant, produced by the liver, primarily in response to stimulation by interleukin-6 (IL-6). The lower limit of detection of routine CRP is 8mg/dL (or higher), yet the mean CRP in the general population is <2mg/dL11 (as measured by high sensitivity assays). Therefore, patients with early RA may have low-grade inflammation not detected by routine CRP. This has been demonstrated in patients with established disease12, but no studies have been done in early disease. Disease activity variables correlated with increases in highly-sensitive CRP (hs-CRP) and hs-CRP was better than ESR at predicting disease activity and severity12. Interestingly, on retrospective analysis of blood donor serum, increased levels of hs-CRP have been noted in RA patients during the pre-clinical phase, most commonly within the two years prior to symptom onset13. This suggests immunologic changes occur prior to the development of the symptomatic stage and provides an exciting tool for assisting in the diagnosis of very early inflammatory disease

Eligibility

Ages Eligible for Study:

18 Years and older

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

Yes

Sampling Method:

Non-Probability Sample

Study Population

Patients who are attending GP Practices in the Yorkshire and surrounding regions.

Criteria

Inclusion Criteria:

For the purpose of this study, "musculoskeletal complaint" is defined as any new joint / muscular symptoms, including (but not limited to)

Rotator cuff tendonitis / subacromial bursitis

Carpal tunnel syndrome

Tendonitis e.g. epicondylitis "New" complaint is defined as a symptom in which the patient has not previously reported to their GP.

GP and Musculoskeletal referred patients:

Subject must fulfil all of the following conditions or characteristics in order to be considered for study enrolment or participation:

Is age > 18 years

Has a new musculoskeletal complaint or has a family member with RA

Is capable of understanding and signing an informed consent form

Rheumatology Clinic referred patients:

Subject must fulfil all of the following conditions or characteristics in order to be considered for study enrolment or participation:

Is age > 18 years

Has a new musculoskeletal complaint

Is capable of understanding and signing an informed consent form

Has tested CCP Ab positive

Exclusion Criteria:

GP and Musculoskeletal referred patients:

Subjects with any of the following conditions or characteristics will be excluded

For the MRI imaging component, the following exclusions will apply; pacemaker, surgical clips within the head, certain inner ear implants, neuro-electrical stimulators or metal fragments within the eye or head or eGFR < 45 ml/min/1.73 m2. In patients with previous penetrating trauma to the eye, or patients at high risk of previous metal foreign body injury to the eye (e.g. welding), skull x-ray will be performed; these patients may be included in the absence of residual metal fragments on x-ray.

Rheumatology clinic referred patients:

Subjects with any of the following conditions or characteristics will be excluded

For the MRI imaging component, the following exclusions will apply; pacemaker, surgical clips within the head, certain inner ear implants, neuro-electrical stimulators or metal fragments within the eye or head or eGFR < 45 ml/min/1.73 m2. In patients with previous penetrating trauma to the eye, or patients at high risk of previous metal foreign body injury to the eye (e.g. welding), skull x-ray will be performed; these patients may be included in the absence of residual metal fragments on x-ray.

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT02012764